A wet desulfurization device and its control system

Abstract

The present invention discloses a wet desulfurization device and a control system thereof, wherein the wet desulfurization device comprises: a desulfurization agent extrusion device, the desulfurization agent extrusion device is connected to a feed port of a dilution device, the discharge port of the dilution device is connected to a first feed port of a storage tank through a first pipeline; an absorption tower, the discharge port of the storage tank is connected to a liquid inlet of the absorption tower through a second pipeline, the liquid outlet of the absorption tower is connected to a second feed port of the storage tank through a third pipeline, and a delivery pump 1 is connected to the second pipeline; a dust collector, the air inlet of the dust collector is connected to a flue gas inlet pipe, and the air outlet of the dust collector is connected to the air inlet of the absorption tower through a fourth pipeline. The present invention removes dust from flue gas to prevent the flue dust from affecting subsequent desulfurization work.

Description

Technical Field

[0001] The invention belongs to the field of wet desulfurization, and in particular relates to a wet desulfurization device and a control system thereof. Background Art

[0002] Limestone-gypsum wet desulfurization is the main flue gas desulfurization method in thermal power plants and is widely used at home and abroad. The mechanism of wet desulfurization is to pass the flue gas into the absorption tower, spray and wash the flue gas with desulfurizer limestone slurry, use limestone to absorb sulfur dioxide in the flue gas to generate calcium sulfite, and then oxidize it to obtain gypsum as a desulfurization byproduct. In this process, the pH of the slurry will affect the desulfurization efficiency and the quality of gypsum.

[0003] The main advantages of limestone-gypsum wet desulfurization are: wide range of applicable coal types, high desulfurization efficiency (when Ca / S=1 in some devices, the desulfurization efficiency is greater than 90%), high absorbent utilization rate (greater than 90%), high equipment operation rate (up to more than 90%), high working reliability (currently the most mature flue gas desulfurization process), and the desulfurizer - limestone is abundant and cheap.

[0004] Existing wet desulfurization devices, such as the CN208003753U limestone gypsum wet desulfurization system, have the following problems:

[0005] Before the flue gas enters the absorption tower, there is a lack of equipment to remove dust from the flue gas, resulting in a large amount of impurities in the desulfurization by-product gypsum. Summary of the invention

[0006] The present invention provides a wet desulfurization device and a control system thereof, which are used to solve the technical problems raised by the above-mentioned background technology.

[0007] In order to solve the above technical problems, the present invention discloses a wet desulfurization device, comprising:

[0008] A desulfurizing agent extrusion device, wherein the desulfurizing agent extrusion device is connected to a feed port of a diluting device, and a discharge port of the diluting device is connected to a first feed port of a storage tank through a first pipeline;

[0009] An absorption tower, wherein the discharge port of the storage tank is connected to the liquid inlet of the absorption tower through a second pipeline, the liquid discharge port of the absorption tower is connected to the second feed port of the storage tank through a third pipeline, and a delivery pump 1 is connected to the second pipeline;

[0010] A dust collector, wherein the air inlet of the dust collector is connected to the flue gas inlet pipe, and the air outlet of the dust collector is connected to the air inlet of the absorption tower through a fourth pipeline.

[0011] Preferably, the desulfurizing agent extrusion device comprises:

[0012] A support is fixedly connected to the support with a base plate, a gypsum extruder is fixedly installed on the base plate, the upper end of the gypsum extruder is connected to a feed hopper, a gypsum storage box is connected above the feed hopper, a storage box is also fixedly connected to the base plate, the extrusion cylinder of the gypsum storage box is fixedly connected to the storage box through a first bracket, and the gypsum storage box is fixedly connected to the storage box through a second bracket.

[0013] Preferably, the dust collector comprises:

[0014] A dust collector shell, one side of the lower part of the dust collector shell is connected to the smoke inlet pipe, the dust collector shell is divided into a driving chamber and a dust removal chamber by a horizontal baffle, three groups of cylindrical filter screens spaced left and right are arranged in the dust removal chamber, and a filter screen driving device is connected in the driving chamber.

[0015] Preferably, the dust collector further comprises:

[0016] The processing shell is fixedly connected to one side of the dust collector shell. The dust removal chamber is connected to the processing shell through the dust suction device. The lower end of the processing shell is connected to the fifth pipeline. The fifth pipeline is connected to the inlet of the second delivery pump. The fifth pipeline is also connected to the liquid inlet pipe. The outlet of the second delivery pump is connected to the first nozzle in the processing shell through the sixth pipeline.

[0017] Preferably, the lower end of the cylindrical filter is closed, a hollow exhaust rod is fixedly arranged on the upper end of the cylindrical filter, only the hollow exhaust rod connection port is left on the upper end of the cylindrical filter, and the rest of the cylindrical filter is closed, and the lower end of the hollow exhaust rod is connected to the inside of the cylindrical filter;

[0018] An air outlet cavity is arranged in the middle of the horizontal baffle plate, and the rear side of the air outlet cavity is connected to the air outlet pipe. Vertical openings are arranged on the left and right sides of the air outlet cavity respectively, and an elastic sealing member is arranged at a lower end of the vertical opening. The hollow exhaust rods of the cylindrical filter screens on the left and right sides are fixedly penetrated by the elastic sealing member, and an exhaust port is arranged on the upper side wall of the hollow exhaust rod of the middle cylindrical filter screen, and the exhaust ports on the upper parts of the hollow exhaust rods of the cylindrical filter screens on the left and right sides are connected with the air outlet cavity through a first hose.

[0019] Preferably, the filter screen driving device comprises:

[0020] Two groups of left-right symmetrical fixing frames are respectively fixedly connected to the inner wall of the driving cavity and the horizontal baffle;

[0021] A lifting drive device is connected to the two sets of fixing frames, and is used to drive a vertical driving rod to move up and down, and the vertical driving rod is fixedly connected to the upper end of the hollow exhaust rod of the middle cylindrical filter screen;

[0022] A connecting block, the upper ends of the hollow exhaust rods of the cylindrical filter screens on the left and right sides are fixedly connected with connecting blocks, the upper ends of the connecting blocks are slidably connected to the fixing frame left and right, the side of the connecting block away from the vertical driving rod is fixedly connected to the horizontal sleeve, the horizontal sleeve is slidably connected with a horizontal slider, and the first spring is fixedly connected between the horizontal slider and the connecting block;

[0023] Two groups of left-right symmetrical support rods correspond to the two groups of connection blocks respectively. The upper ends of the support rods are hinged to the vertical driving rods, and the lower ends of the support rods are hinged to the corresponding connection blocks.

[0024] Preferably, the dust collector further comprises:

[0025] The vertical shaft is rotatably connected to the lower end of the dust collector shell. A removable annular shell is mounted on the lower part of the vertical shaft. The annular shell is connected to the smoke inlet pipe through a second hose. An arc groove is arranged around the circumference in the middle part of the vertical shaft. A pulley is slidably connected in the arc groove. The pulley is fixedly connected to the lower end of the cylindrical filter screen in the middle part through a vertical rod. The annular shell is provided with multiple air outlet holes.

[0026] Preferably, the absorption tower comprises:

[0027] The tower body has an air outlet at the upper end thereof, a demister is arranged at the upper part of the tower body, and a driving housing is fixedly connected to the right side of the tower body;

[0028] The horizontal pipeline rotates and penetrates the left side of the driving shell and the right side of the tower body. The lower end of the left side of the horizontal pipeline is integrally fixedly connected with a connecting pipe. The connecting pipe includes: a horizontal pipe section and a connecting pipe section. The left end of the horizontal pipe section is fixedly connected with a second liquid outlet pipe. The lower end of the second liquid outlet pipe is connected to a plurality of third nozzles. The lower end of the connecting pipeline is connected to the horizontal pipe section. The upper end of the connecting pipe section is connected to the horizontal pipeline. The left end of the horizontal pipeline is fixedly connected with the first liquid outlet pipe. The lower end of the first liquid outlet pipe is connected to a plurality of second nozzles. The left ends of the first liquid outlet pipe and the second liquid outlet pipe are closed.

[0029] The driving motor is fixedly installed in the driving housing, the output shaft of the driving motor is connected to the horizontal pipeline through the first transmission assembly, the output shaft of the driving motor is parallel to the horizontal pipeline, the left end of the output shaft of the driving motor is also fixedly provided with a horizontal shaft, the horizontal shaft is rotatably connected to the left inner wall of the driving housing, and a driving gear is fixedly sleeved on the horizontal shaft;

[0030] A vertical pipe is fixedly passed through the lower end of the driving housing, the lower end of the vertical pipe is connected to the liquid outlet end of the second pipe, and a connecting port connected to the right end of the horizontal pipe is arranged on the left side of the vertical pipe;

[0031] The lifting rod is fixedly connected to the fixed block on the inner wall of the driving shell. The lifting rod slides up and down and passes through the fixed block. The upper rear side of the lifting rod is provided with meshing teeth that mesh with the driving gear. The lower end of the lifting rod is fixedly connected to the sealing block. The sealing block is sealed and slidably connected up and down in the vertical pipe. The sealing block is used to seal the connecting port.

[0032] The present invention also discloses a control system for a wet desulfurization device, wherein the flue gas inlet pipe, the first pipeline, the second pipeline, the third pipeline, and the fourth pipeline are all connected with electromagnetic valves, and the dilution device includes a dilution tank and a stirring device for stirring the slurry in the dilution tank. The control system of the wet desulfurization device includes:

[0033] The first slurry detection device is used to detect the slurry information in the storage tank. The slurry information in the storage tank includes: the slurry level in the storage tank, the slurry density in the storage tank, and the slurry concentration in the storage tank:

[0034] The second slurry detection device is used to detect the slurry information in the dilution device, and the slurry information in the dilution device includes: the slurry density in the dilution device, the slurry level in the dilution device, and the slurry concentration in the dilution device;

[0035] A control device is electrically connected to the desulfurizer extrusion device, the stirring device, the solenoid valve, the first detection slurry detection device, the second detection slurry detection device, and the delivery pump.

[0036] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 A schematic diagram of the internal structure of a dust collector in an embodiment of the present invention;

[0040] Figure 3 Schematic diagram of the internal structure of an absorption tower in one embodiment of the present invention.

[0041] In the figure: 1. desulfurizing agent extrusion device; 11. support; 12. bottom plate; 13. gypsum extruder; 14. feed hopper; 15. gypsum storage box; 16. storage box; 17. extrusion barrel; 18. first bracket; 19. second bracket; 2. dilution device; 3. storage tank; 4. absorption tower; 41. tower body; 42. air outlet; 43. demister; 44. drive shell; 45. horizontal pipeline; 46. connecting pipe; 461. horizontal pipe section; 462. connecting pipe section; 47. second liquid outlet pipe; 48. third nozzle; 49. first liquid outlet pipe; 410. second nozzle; 411. driving motor; 412. horizontal shaft; 413. driving gear; 414. vertical pipeline; 415. lifting rod; 416. fixing block; 417. sealing block; 5. dust collector; 51 , dust collector shell; 52, smoke inlet pipe; 53, horizontal baffle; 54, drive chamber; 55, dust removal chamber; 56, filter screen; 57, filter screen drive device; 571, fixed frame; 572, lifting drive device; 573, drive rod; 574, connecting block; 575, horizontal sleeve; 576, horizontal slider; 577, support rod; 58, processing shell; 581, dust suction device; 59, fifth pipeline; 510, liquid inlet pipe; 511, sixth pipeline; 512, hollow exhaust rod; 513, air outlet chamber; 514, first hose; 515, vertical shaft; 516, annular shell; 517, arc groove; 518, pulley; 519, vertical port one; 520, elastic sealing member; 6, first pipeline; 7, second pipeline; 8, third pipeline; 9, fourth pipeline. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The present invention provides the following embodiments

[0045] Example 1

[0046] The embodiment of the present invention provides a wet desulfurization device and a control system thereof, such as Figure 1-Figure 3 As shown, it comprises: a desulfurizing agent extrusion device 1, the desulfurizing agent extrusion device 1 is connected to the feed port of the dilution device 2, and the discharge port of the dilution device 2 is connected to the first feed port of the storage tank 3 through a first pipeline 6;

[0047] Absorption tower 4, the discharge port of the storage tank 3 is connected to the liquid inlet of the absorption tower 4 through a second pipeline 7, the liquid outlet of the absorption tower 4 is connected to the second feed port of the storage tank 3 through a third pipeline 8, and a delivery pump 1 is connected to the second pipeline 7;

[0048] The dust collector 5 has an air inlet connected to the flue gas inlet pipe 52, and the air outlet of the dust collector 5 is connected to the air inlet of the absorption tower 4 through the fourth pipeline 9. The dilution device 2 may include a dilution box and a stirring device connected thereto to achieve dilution of the desulfurizer limestone into a desulfurizer limestone slurry.

[0049] The working principle and beneficial effects of the above technical solution are:

[0050] The gypsum is squeezed into the dilution device 2 through the desulfurizer extrusion device 1 for dilution and stored in the storage tank 3. The gypsum slurry in the storage tank 3 is input into the absorption tower 4 through the delivery pump 1 to react with the flue gas after the dust removal by the dust collector 5, so as to achieve the effect of wet desulfurization.

[0051] The present invention solves the following problems raised in the background art: the existing wet desulfurization devices, such as CN208003753 U limestone gypsum wet desulfurization system, have: before the flue gas enters the absorption tower, there is a lack of dust removal equipment for the flue gas, resulting in a large amount of gypsum impurities in the desulfurization byproduct.

[0052] Example 2

[0053] On the basis of Example 1, Figure 1 As shown, it also includes: the desulfurizing agent extrusion device 1 includes:

[0054] A support 11 is fixedly connected to a base plate 12, a gypsum extruder 13 is fixedly installed on the base plate 12, the upper end of the gypsum extruder 13 is connected to a feed hopper 14, a gypsum storage box 15 is connected above the feed hopper 14, a storage box 16 is also fixedly connected to the base plate 12, an extrusion cylinder 17 of the gypsum storage box 15 is fixedly connected to the storage box 16 via a first bracket 18, and the gypsum storage box 15 is fixedly connected to the storage box 16 via a second bracket 19.

[0055] The beneficial effects of the above technical solution are:

[0056] The gypsum storage box 15 inputs gypsum into the gypsum extruder 13 through the feed hopper 14, and then extrude the gypsum into the dilution device 2 through the extrusion tube 17. The first bracket 18, the second bracket 19, and the storage box 16 ensure the stable support of the extrusion tube 17 and the gypsum storage box 15; the storage box 16 can be placed in the auxiliary materials or auxiliary tools required for the desulfurization system.

[0057] Example 3

[0058] On the basis of Example 1 or 2, Figure 1 As shown, the dust collector 5 comprises:

[0059] The dust collector shell 51 has a smoke inlet pipe 52 connected to one side of the lower part of the dust collector shell 51. The dust collector shell 51 is divided into a driving chamber 54 and a dust removal chamber 55 by a horizontal baffle 53. Three groups of cylindrical filter screens 56 spaced apart on the left and right are arranged in the dust removal chamber 55. A filter screen driving device 57 is connected to the driving chamber 54.

[0060] Preferably, the dust collector 5 further comprises:

[0061] The processing shell 58 is fixedly connected to one side of the dust collector shell 51. The dust removal chamber 55 is connected to the processing shell 58 through the dust suction device 581. The lower end of the processing shell 58 is connected to the fifth pipe 59. The fifth pipe 59 is connected to the inlet of the delivery pump 2. The fifth pipe 59 is also connected to the liquid inlet pipe 510. The outlet of the delivery pump 2 is connected to the first nozzle in the processing shell 58 through the sixth pipe 511.

[0062] Preferably, the lower end of the cylindrical filter screen 56 is closed, and a hollow exhaust rod 512 is fixedly arranged at the upper end of the cylindrical filter screen 56. Only the connection port of the hollow exhaust rod 512 is left at the upper end of the cylindrical filter screen 56, and the rest of the part is closed, and the lower end of the hollow exhaust rod 512 is connected to the inside of the cylindrical filter screen 56;

[0063] An air outlet cavity 513 is arranged in the middle of the horizontal baffle plate 53, and the rear side of the air outlet cavity 513 is connected to the air outlet pipe, and vertical openings 519 are arranged on the horizontal baffle plate 53 on the left and right sides of the air outlet cavity, respectively, and elastic sealing members 520 are arranged at the lower ends of the vertical openings 519, and hollow exhaust rods 512 of the cylindrical filter screens 56 on the left and right sides are fixedly passed through the elastic sealing members 520, and exhaust ports are arranged on the upper side walls of the hollow exhaust rods 512 of the middle cylindrical filter screen 56, and the exhaust ports on the upper parts of the hollow exhaust rods 512 of the cylindrical filter screens 56 on the left and right sides are connected to the air outlet cavity 513 through the first hose 514.

[0064] Preferably, the filter driving device 57 comprises:

[0065] Two groups of left-right symmetrical fixing frames 571 are fixedly connected to the inner wall of the driving cavity 54 and the horizontal baffle 53 respectively;

[0066] A lifting drive device 572 is connected to the two sets of fixing frames 571. The lifting drive device 572 is used to drive a vertical driving rod 573 to move up and down. The vertical driving rod 573 is fixedly connected to the upper end of the hollow exhaust rod 512 of the middle cylindrical filter screen 56;

[0067] The upper ends of the hollow exhaust rods 512 of the cylindrical filter screens 56 on the left and right sides are fixedly connected with the connecting blocks 574, and the upper ends of the connecting blocks 574 are slidably connected to the fixing frame 571. The side of the connecting block 574 away from the vertical driving rod is fixedly connected to the horizontal sleeve 575, and a horizontal slider 576 is slidably connected inside the horizontal sleeve 575. A first spring is fixedly connected between the horizontal slider 576 and the connecting block 574;

[0068] Two groups of left-right symmetrical support rods 577 correspond to the two groups of connection blocks 574 one by one, respectively. The upper ends of the support rods 577 are hinged to the vertical driving rods 573 , and the lower ends of the support rods 577 are hinged to the corresponding connection blocks 574 .

[0069] Preferably, the dust collector 5 further comprises:

[0070] The vertical shaft 515 is rotatably connected to the lower end of the dust collector housing 51. A removable annular shell 516 is mounted on the lower part of the vertical shaft 515. The annular shell 516 is connected to the smoke inlet pipe 52 through a second hose. An arc groove 517 is arranged around the circumference in the middle of the vertical shaft 515. A pulley 518 is slidably connected in the arc groove 517. The pulley 518 is fixedly connected to the lower end of the cylindrical filter screen 56 in the middle through a vertical rod. The annular shell 516 is provided with a plurality of air outlet holes.

[0071] The lifting drive device 572 is an existing lifting device, which can be an electric telescopic rod, a hydraulic rod, a gas rod, or a fork-type lifting device; the horizontal baffle 53 can be set as a temperature baffle;

[0072] The working principle and beneficial effects of the above technical solution are:

[0073] 1. When the flue gas enters the dust collector housing 51 through the flue gas inlet pipe 52, the flue gas flows along Figure 2 The smoke enters the cylindrical filter 56 in the direction of the middle arrow, and then directly enters the air outlet cavity 513 through the hollow exhaust rod 512 in the cylindrical filter 56 and is then discharged, or enters the air outlet cavity 513 through the first hose 514 and is then discharged, thereby achieving the goal of filtering the smoke through multiple cylindrical filter screens 56 at the same time and then converging and discharging the smoke, and the smoke does not pass through the filter drive device above the horizontal baffle 53, so as to avoid affecting the operation or life of the filter drive device.

[0074] 2. When the outer side of the columnar filter 56 blocks a lot of smoke and dust, the lifting drive device 572 is controlled, and the lifting drive device 572 drives the driving rod 573 to perform periodic lifting and lowering movements in the vertical direction, so that the columnar filter 56 in the middle can be shaken up and down to accelerate dust removal;

[0075] At the same time, the driving rod 573 is lifted and lowered to move left and right through the two supporting rods 577, so that the left and right connecting blocks 574 and the corresponding cylindrical filter screen 56 can shake left and right. When the connecting block 574 moves outward, the horizontal slider 576 and the fixing frame 571 can cooperate with the vibration of the first spring at the same time, which can accelerate the shaking of the cylindrical filter screen 56 to discharge dust.

[0076] Finally, the dust discharged from the cylindrical filter 56 is sucked into the processing shell 58 through the dust suction device 581, and the external water source is input into the first nozzle through the liquid inlet pipe 510 and the second delivery pump to absorb the dust; through the above-mentioned dust discharge and the treatment of smoke, the dust removal efficiency and quality of the dust collector of the present invention are guaranteed, thereby ensuring the final desulfurization efficiency and effect.

[0077] 3. The driving rod 573 performs periodic lifting and lowering movements in the vertical direction, and can drive the vertical shaft 515 to rotate through the cooperation of the vertical rod, the pulley 518, and the arc groove 517, thereby realizing the rotation of the annular shell 516, expanding the air outlet range of the annular shell 516, and avoiding the intake of smoke into the cylindrical filter 56 through only one fixed smoke inlet pipe 52, which causes excessive smoke in the local area of ​​the cylindrical filter 56 and is easy to be blocked.

[0078] 4. The present invention is controlled by a lifting drive device 572, which can realize the above-mentioned various functions and is easy to control.

[0079] Example 4

[0080] On the basis of any one of Examples 1-3, Figure 2 As shown, the absorption tower 4 comprises:

[0081] A tower body 41, an air outlet 42 is arranged at the upper end of the tower body 41, a demister 43 is arranged at the upper part of the tower body 41, and a driving housing 44 is fixedly connected to the right side of the tower body 41;

[0082] The horizontal pipe 45 rotates and passes through the left side of the driving shell 44 and the right side of the tower body 41. The lower end of the left side of the horizontal pipe 45 is integrally fixedly connected with a connecting pipe 46. The connecting pipe 46 includes: a horizontal pipe section 461 and a connecting pipe section 462. The left end of the horizontal pipe section 461 is fixedly connected with a second liquid outlet pipe 47. The lower end of the second liquid outlet pipe 47 is connected to a plurality of third nozzles 48. The lower end of the connecting pipe section 462 is connected to the horizontal pipe section 461. The upper end of the connecting pipe section 462 is connected to the horizontal pipe 45. The left end of the horizontal pipe 45 is fixedly connected with a first liquid outlet pipe 49. The lower end of the first liquid outlet pipe 49 is connected to a plurality of second nozzles 410. The left ends of the first liquid outlet pipe 49 and the second liquid outlet pipe 47 are closed.

[0083] The driving motor 411 is fixedly installed in the driving shell 44. The output shaft of the driving motor 411 is connected to the horizontal pipe 45 through a first transmission assembly (which can be a belt transmission assembly and a gear transmission assembly). The output shaft of the driving motor 411 is parallel to the horizontal pipe 45. A horizontal shaft 412 is fixedly arranged at the left end of the output shaft of the driving motor 411. The horizontal shaft 412 is rotatably connected to the left inner wall of the driving shell 44. A driving gear 413 is fixedly sleeved on the horizontal shaft 412.

[0084] The vertical pipe 414 is fixedly passed through the lower end of the driving housing 44, the lower end of the vertical pipe 414 is connected to the liquid outlet end of the second pipe 7, and a communication port connected to the right end of the horizontal pipe 45 is arranged on the left side of the vertical pipe 414;

[0085] The lifting rod 415 is fixedly connected to the inner wall of the driving shell 44 with a fixed block 416. The lifting rod 415 slides up and down and passes through the fixed block 416. The upper rear side of the lifting rod is provided with meshing teeth that mesh with the driving gear 413. The lower end of the lifting rod 415 is fixedly connected to a sealing block 417. The sealing block 417 is sealed and slidably connected up and down in the vertical pipe 414. The sealing block 417 is used to seal the connecting port.

[0086] The beneficial effects of the above technical solution are:

[0087] 1. The flue gas after dust removal is passed into the absorption tower 4 through the fourth pipe 9. At the same time, the desulfurizing agent limestone slurry enters the vertical pipe 414 through the second pipe 7 and then enters the horizontal pipe 45 through the connecting port, and enters the first liquid outlet pipe 49 and the second liquid outlet pipe 47 through the connecting pipe 46. Finally, the flue gas is desulfurized by spraying through the second nozzle 410 and the third nozzle 48 at different heights. The desulfurization efficiency and effect are guaranteed by spraying through the second nozzle 410 and the third nozzle 48 at different heights. Finally, the desulfurized gas is defogged by the demister and then discharged.

[0088] 2. (1) Control the driving motor 411 to rotate forward and reverse, and on the one hand, drive the horizontal pipe 45 to rotate through the first transmission component, thereby driving the second nozzle 410 and the third nozzle 48 to further adjust the spraying range, and further ensure the desulfurization efficiency and effect;

[0089] (2) On the other hand, the driving motor 411 is controlled to rotate forward and reversely. The driving motor 411 drives the horizontal shaft 412 and the driving gear 413 to rotate, thereby driving the lifting rod 415 to move up and down. The lifting rod 415 can drive the sealing block 417 to move downward to seal the connecting port or open the connecting port, thereby realizing the periodic introduction of the desulfurization agent limestone slurry into the first liquid outlet pipe 49 and the second liquid outlet pipe 47.

[0090] Example 5, based on any one of Examples 1-4, the present invention further discloses a control system for a wet flue gas desulfurization device, wherein the flue gas inlet pipe 52, the first pipeline 6, the second pipeline 7, the third pipeline 8, and the fourth pipeline 9 are all connected with electromagnetic valves, and the dilution device 2 includes a dilution tank and a stirring device for stirring the slurry in the dilution tank. The control system of the wet flue gas desulfurization device includes:

[0091] The first slurry detection device is used to detect the slurry information in the storage tank 3. The slurry information in the storage tank 3 includes: the slurry level in the storage tank 3, the slurry density in the storage tank 3, and the slurry concentration in the storage tank 3:

[0092] The second slurry detection device is used to detect the slurry information in the dilution device 2, and the slurry information in the dilution device 2 includes: the slurry density in the dilution device 2, the slurry level in the dilution device 2, and the slurry concentration in the dilution device 2;

[0093] The control device is electrically connected to the desulfurizer extrusion device 1, the stirring device, the solenoid valve, the first slurry detection device, the second slurry detection device, and the delivery pump.

[0094] The beneficial effects of the above technical solution are: the solenoid valve is used to control the on-off and flow rate of the fluid where it is located, and the present invention realizes intelligent regulation of the working process of the wet desulfurization device, and the control is convenient.

[0095] The slurry information in the dilution device can be adjusted according to the slurry information in the storage tank 3 detected by the first slurry detection device, and the material information output by the desulfurizer extrusion device 1 and the water information input into the dilution device can be adjusted according to the slurry information in the dilution device 2 to ensure that the slurry is at an appropriate density, concentration and material level.

[0096] Embodiment 6, based on Embodiment 5, further comprises:

[0097] The first gas detection device is used to detect the flue gas parameters at the inlet of the absorption tower, and the flue gas parameters at the inlet of the absorption tower include: the flue gas flow rate at the inlet of the absorption tower;

[0098] A second gas detection device is provided at each second nozzle and third nozzle, and is used to detect smoke parameters at the location of the second gas detection device (the spraying area of ​​the second nozzle or the spraying area of ​​the third nozzle). The smoke parameters at the location of the second gas detection device include: smoke pressure at the location of the second gas detection device, and smoke flow rate at the location of the second gas detection device;

[0099] A third slurry detection device, each second nozzle and third nozzle is an electric nozzle, each second nozzle and third nozzle is provided with a third slurry detection device, and the third slurry detection is used to detect the slurry flow at the outlet of the second nozzle or the third nozzle;

[0100] a first control module and a first calculation module, wherein the first control module is used to control the drive motor 411 to operate at rated operating parameters while the flue gas parameters at the inlet of the absorption tower are the rated flue gas flow rate Q0, and the slurry flow rate at each second nozzle and the third nozzle is the rated slurry flow rate Q2 for the first duration, and control the second gas detection device to operate multiple times within the first duration, and the first calculation module calculates the gas state coefficient of the spraying area corresponding to each second nozzle or the third nozzle based on the detection value of the second gas detection device and formula (1);

[0101] When the gas state coefficient of the corresponding spraying area is greater than the preset gas state coefficient threshold W0, the corresponding spraying area is determined to be the spraying area to be adjusted, and a first ratio of the number of spraying areas to be adjusted to the total number of spraying areas (each second nozzle is a spraying area, and each third nozzle also corresponds to a spraying area) is obtained;

[0102] When the first ratio is greater than the first preset value and the average value of the gas state coefficients of all spraying areas to be adjusted is greater than or equal to the second preset value, the second calculation module calculates the target flue gas flow rate at the inlet of the absorption tower based on formula (2), and controls the solenoid valve corresponding to the flue gas inlet pipe to work so that the detection value of the first gas detection device is within the preset range of the target flue gas flow rate;

[0103] When the first ratio is greater than the first preset value and the average value A1 of the gas state coefficients of all the spraying areas to be adjusted is less than the second preset value, the third calculation module determines the target slurry flow rate of the second nozzle or the third nozzle corresponding to the spraying area to be adjusted based on formula (3), and controls the second nozzle or the third nozzle corresponding to the spraying area to be adjusted to work so that the detection value of the corresponding third detection device is within the preset range of the target slurry flow rate;

[0104]

[0105] Among them, W i is the gas state coefficient of the i-th spraying area, is the average detection value of the kth smoke parameter detected by the second gas detection device corresponding to the i-th spraying area within the first time period, maxP i is the maximum detection value of the kth smoke parameter detected by the second gas detection device corresponding to the i-th spraying area within the first time period; P k0 is the kth flue gas parameter in the spraying area corresponding to the current slurry concentration in the second pipeline 7 and the rated slurry flow rate; Π is the cumulative multiplication symbol; M is the total number of flue gas parameters detected by the second gas detection device;

[0106]

[0107] Q1 is the target flue gas flow rate, ln is the natural logarithm, e is the natural constant, K1 is the first adjustment coefficient (the value is greater than 0 and less than 1, and is preset to be different according to the influence of A1 on the purification effect), K2 is the second adjustment coefficient (the value is greater than 0 and less than 1, and is preset to be different according to the influence of A1 on the purification effect). The influence on the flue gas flow is preset to be different); the second nozzle 410 and the third nozzle 48 are N pairs of nozzle groups facing each other up and down; w js1 is the sth flue gas parameter obtained by the third gas detection device corresponding to the third nozzle 48 in the jth pair of nozzles; W js2 is the sth flue gas parameter obtained by the third gas detection device corresponding to the second nozzle 410 in the jth pair of nozzles; δ s is the flue gas flow adjustment weight corresponding to the sth flue gas parameter; Q0 is the rated flue gas flow;

[0108]

[0109] Q d2 is the target slurry flow rate of the nozzle (the second nozzle or the third nozzle) corresponding to the dth area to be adjusted, W ds1 is the sth flue gas parameter obtained by the third gas detection device corresponding to the third nozzle 48 in the nozzle group corresponding to the dth area to be adjusted; W ds2 μ is the sth flue gas parameter obtained by the third gas detection device corresponding to the second nozzle 410 in the nozzle group corresponding to the dth area to be adjusted; s is the slurry flow adjustment weight corresponding to the sth flue gas parameter; Q2 is the rated slurry flow; W0 is the preset gas state coefficient threshold; K3 and K4 are the third adjustment coefficients (the value is greater than 0 and less than 1, according to The influence on the slurry flow rate is preset to be different) and the fourth adjustment coefficient (the value is greater than 0 and less than 1, according to The influence of W on the slurry flow is preset to be different); d is the gas state coefficient of the dth area to be adjusted.

[0110] The beneficial effects of the above technology are:

[0111] 1. First, control the drive motor 411 to work at rated working parameters while the flue gas parameters at the inlet of the absorption tower are the rated flue gas flow rate Q0, and the slurry flow rate at each second nozzle and the third nozzle is the rated slurry flow rate Q2 for the first working period; realize the actual state of each spraying area corresponding to the rated parameters of each component; when the gas state coefficient of the corresponding spraying area is greater than the preset gas state coefficient threshold, determine the corresponding spraying area as the spraying area to be adjusted, that is, when the gas state coefficient of the corresponding spraying area is greater than the preset gas state coefficient threshold, it means that the current slurry flow rate cannot meet the purification effect requirements of the flue gas in the current area, and it is necessary to adjust the state of the components in the purification tower to ensure the purification effect;

[0112] Specific:

[0113] 2. When the first ratio is greater than the first preset value and the average value of the gas state coefficients of all spraying areas to be adjusted is greater than or equal to the second preset value, the second calculation module calculates the target flue gas flow rate at the inlet of the absorption tower based on formula (2), and controls the solenoid valve corresponding to the flue gas inlet pipe to work so that the detection value of the first gas detection device is within the preset range of the target flue gas flow rate;

[0114] When the purification effect is abnormal in most spraying areas, the smoke intake of the purification tower can be adjusted according to the applicability of the purification effect to ensure the purification effect;

[0115] 3. When the first ratio is greater than the first preset value and the average value A1 of the gas state coefficients of all the spraying areas to be adjusted is less than the second preset value, the third calculation module determines the target slurry flow rate of the second nozzle or the third nozzle corresponding to the spraying area to be adjusted based on formula (3), and controls the second nozzle or the third nozzle corresponding to the spraying area to be adjusted to work so that the detection value of the corresponding third detection device is within the preset range of the target slurry flow rate;

[0116] When the purification effect of a small number of spraying areas is abnormal, the slurry amount of the corresponding nozzle is adjusted, and the slurry amount of the corresponding nozzle is adjusted adaptively according to the difference in the flue gas state between the upper and lower relative spraying areas to ensure the purification effect after adjustment.

[0117] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A wet desulfurization device, characterized in that: include: A desulfurizing agent extrusion device (1), wherein the desulfurizing agent extrusion device (1) is connected to a feed port of a diluting device (2), and a discharge port of the diluting device (2) is connected to a first feed port of a storage tank (3) via a first pipeline (6); An absorption tower (4), wherein the discharge port of the storage tank (3) is connected to the liquid inlet of the absorption tower (4) via a second pipeline (7), the liquid discharge port of the absorption tower (4) is connected to the second feed port of the storage tank (3) via a third pipeline (8), and a delivery pump 1 is connected to the second pipeline (7); A dust collector (5), wherein the air inlet of the dust collector (5) is connected to a flue gas inlet pipe (52), and the air outlet of the dust collector (5) is connected to the air inlet of an absorption tower (4) via a fourth pipeline (9); The dust collector (5) comprises: A dust collector housing (51), wherein one side of the lower portion of the dust collector housing (51) is connected to a smoke inlet pipe (52), the dust collector housing (51) is divided into a drive chamber (54) and a dust removal chamber (55) by a horizontal baffle (53), three groups of columnar filter screens (56) spaced apart from each other are arranged in the dust removal chamber (55), and a filter screen drive device (57) is connected in the drive chamber (54); The dust collector (5) also includes: The processing shell (58) is fixedly connected to one side of the dust collector housing (51); the dust removal chamber (55) is connected to the processing shell (58) through the dust suction device (581); the lower end of the processing shell (58) is connected to the fifth pipeline (59); the fifth pipeline (59) is connected to the inlet of the second delivery pump; the fifth pipeline (59) is also connected to the liquid inlet pipe (510); the outlet of the second delivery pump is connected to the first nozzle in the processing shell (58) through the sixth pipeline (511); The lower end of the columnar filter (56) is closed, and a hollow exhaust rod (512) is fixedly arranged at the upper end of the columnar filter (56). Only the connection port of the hollow exhaust rod (512) is left at the upper end of the columnar filter (56), and the rest of the portion is closed, and the lower end of the hollow exhaust rod (512) is connected to the inside of the columnar filter (56); An air outlet cavity (513) is arranged in the middle of the horizontal baffle (53), and the rear side of the air outlet cavity (513) is connected to an air outlet pipe. Vertical openings (519) are arranged on the left and right sides of the air outlet cavity on the horizontal baffle (53), and an elastic sealing member (520) is arranged at the lower end of the vertical opening (519). The hollow exhaust rods (512) of the columnar filter screens (56) on the left and right sides are fixedly penetrated through the elastic sealing member (520), and an exhaust port is arranged on the upper side wall of the hollow exhaust rod (512) of the middle columnar filter screen (56). The exhaust ports on the upper parts of the hollow exhaust rods (512) of the columnar filter screens (56) on the left and right sides are connected to the air outlet cavity (513) through the first hose (514); The filter screen driving device (57) comprises: Two groups of left-right symmetrical fixing frames (571) are respectively fixedly connected to the inner wall of the driving cavity (54) and the horizontal baffle (53); A lifting drive device (572) is connected to the two sets of fixing frames (571), and the lifting drive device (572) is used to drive a vertical driving rod (573) to move up and down, and the vertical driving rod (573) is fixedly connected to the upper end of the hollow exhaust rod (512) of the middle columnar filter (56); A connecting block (574), the upper ends of the hollow exhaust rods (512) of the columnar filter screens (56) on the left and right sides are fixedly connected with the connecting blocks (574), the upper ends of the connecting blocks (574) are slidably connected to the fixing frame (571) on the left and right sides, the side of the connecting block (574) away from the vertical driving rod is fixedly connected to the horizontal sleeve (575), the horizontal sleeve (575) is slidably connected with a horizontal slider (576), and a first spring is fixedly connected between the horizontal slider (576) and the connecting block (574); Two groups of left-right symmetrical support rods (577) correspond to the two groups of connection blocks (574) respectively, the upper ends of the support rods (577) are hinged to the vertical drive rods (573), and the lower ends of the support rods (577) are hinged to the corresponding connection blocks (574); The dust collector (5) also includes: A vertical shaft (515) is rotatably connected to the lower end of the dust collector housing (51). A removable annular shell (516) is sleeved on the lower part of the vertical shaft (515). The annular shell (516) is connected to the smoke inlet pipe (52) via a second hose. An arc groove (517) is arranged around the circumference in the middle of the vertical shaft (515). A pulley (518) is slidably connected in the arc groove (517). The pulley (518) is fixedly connected to the lower end of the columnar filter (56) in the middle through a vertical rod. The annular shell (516) is provided with a plurality of air outlet holes.

2. A wet desulfurization device according to claim 1, characterized in that: The desulfurizing agent extrusion device (1) comprises: A support (11) is fixedly connected to a base plate (12) on the support (11), a gypsum extruder (13) is fixedly installed on the base plate (12), the upper end of the gypsum extruder (13) is connected to a feed hopper (14), a gypsum storage box (15) is connected above the feed hopper (14), a storage box (16) is also fixedly connected to the base plate (12), an extrusion cylinder (17) of the gypsum storage box (15) is fixedly connected to the storage box (16) via a first bracket (18), and the gypsum storage box (15) is fixedly connected to the storage box (16) via a second bracket (19).

3. A wet desulfurization device according to claim 1, characterized in that: The absorption tower (4) comprises: A tower body (41), an air outlet (42) is arranged at the upper end of the tower body (41), a demister (43) is arranged at the upper part of the tower body (41), and a driving housing (44) is fixedly connected to the right side of the tower body (41); The horizontal pipe (45) rotates and passes through the left side of the driving shell (44) and the right side of the tower body (41). The lower end of the left side of the horizontal pipe (45) is integrally fixedly connected with a connecting pipe (46). The connecting pipe (46) comprises: a horizontal pipe section (461) and a connecting pipe section (462). The left end of the horizontal pipe section (461) is fixedly connected with a second liquid outlet pipe (47). The lower end of the second liquid outlet pipe (47) is connected to a plurality of third nozzles (48). The lower end of the connecting pipe section (462) is connected to the horizontal pipe section (461). The upper end of the connecting pipe section (462) is connected to the horizontal pipe (45). The left end of the horizontal pipe (45) is fixedly connected with a first liquid outlet pipe (49). The lower end of the first liquid outlet pipe (49) is connected to a plurality of second nozzles (410). The left ends of the first liquid outlet pipe (49) and the second liquid outlet pipe (47) are sealed. A driving motor (411) is fixedly installed in a driving housing (44); an output shaft of the driving motor (411) is drivingly connected to a horizontal pipe (45) via a first transmission assembly; the output shaft of the driving motor (411) is parallel to the horizontal pipe (45); a horizontal shaft (412) is fixedly arranged at the left end of the output shaft of the driving motor (411); the horizontal shaft (412) is rotationally connected to the left inner wall of the driving housing (44); and a driving gear (413) is fixedly sleeved on the horizontal shaft (412); A vertical pipe (414) is fixedly passed through the lower end of the driving housing (44), the lower end of the vertical pipe (414) is connected to the liquid outlet end of the second pipe (7), and a communication port connected to the right end of the horizontal pipe (45) is provided on the left side of the vertical pipe (414); The lifting rod (415) is fixedly connected to the inner wall of the driving shell (44) with a fixed block (416). The lifting rod (415) slides up and down and passes through the fixed block (416). The upper rear side of the lifting rod is provided with meshing teeth that mesh with the driving gear (413). The lower end of the lifting rod (415) is fixedly connected to a sealing block (417). The sealing block (417) is sealed and slidably connected up and down in the vertical pipe (414). The sealing block (417) is used to seal the communication port.

4. A control system for a wet flue gas desulfurization device according to any one of claims 1 to 3, characterized in that: The flue gas inlet pipe (52), the first pipeline (6), the second pipeline (7), the third pipeline (8), and the fourth pipeline (9) are all connected to electromagnetic valves. The dilution device (2) includes a dilution tank and a stirring device for stirring the slurry in the dilution tank. The control system of the wet desulfurization device includes: The first slurry detection device is used to detect slurry information in the storage tank (3), the slurry information in the storage tank (3) includes: slurry material level in the storage tank (3), slurry density in the storage tank (3), and slurry concentration in the storage tank (3): A second slurry detection device is used to detect slurry information in the dilution device (2), the slurry information in the dilution device (2) including: slurry density in the dilution device (2), slurry material level in the dilution device (2), and slurry concentration in the dilution device (2); A control device, wherein the control device is electrically connected to the desulfurizing agent extrusion device (1), the stirring device, the solenoid valve, the first slurry detection device, the second slurry detection device, and the delivery pump; The control system of the wet desulfurization unit also includes: The first gas detection device is used to detect the flue gas parameters at the inlet of the absorption tower, and the flue gas parameters at the inlet of the absorption tower include: the flue gas flow rate at the inlet of the absorption tower; A second gas detection device is provided at each second nozzle and the third nozzle, and is used to detect smoke parameters at the location of the second gas detection device. The smoke parameters at the location of the second gas detection device include: smoke pressure at the location of the second gas detection device, and smoke flow rate at the location of the second gas detection device; A third slurry detection device, each second nozzle and third nozzle is an electric nozzle, each second nozzle and third nozzle is provided with a third slurry detection device, and the third slurry detection is used to detect the slurry flow at the outlet of the second nozzle or the third nozzle; a first control module and a first calculation module, wherein the first control module is used to control the drive motor (411) to work at a rated working parameter and the flue gas parameter at the inlet of the absorption tower is a rated flue gas flow rate , the slurry flow rate at each second nozzle and third nozzle is the rated slurry flow rate The first calculation module calculates the gas state coefficient of the spraying area corresponding to each second nozzle or the third nozzle based on the detection value of the second gas detection device and formula (1); When the gas state coefficient of the corresponding spraying area is greater than the preset gas state coefficient threshold , determine that the corresponding spraying area is the spraying area to be adjusted, and obtain a first ratio of the number of spraying areas to be adjusted to the total number of spraying areas; each second nozzle is a spraying area, and each third nozzle also corresponds to a spraying area; When the first ratio is greater than the first preset value and the average value of the gas state coefficients of all spraying areas to be adjusted is greater than or equal to the second preset value, the second calculation module calculates the target flue gas flow rate at the inlet of the absorption tower based on formula (2), and controls the solenoid valve corresponding to the flue gas inlet pipe to work so that the detection value of the first gas detection device is within the preset range of the target flue gas flow rate; When the first ratio is greater than the first preset value and the average value of the gas state coefficients of all spraying areas to be adjusted is is less than a second preset value, the third calculation module determines the target slurry flow rate of the second nozzle or the third nozzle corresponding to the spraying area to be adjusted based on formula (3), and controls the second nozzle or the third nozzle corresponding to the spraying area to be adjusted to work so that the detection value of the corresponding third detection device is within the preset range of the target slurry flow rate; (1)； in, is the gas state coefficient of the i-th spraying area, is the average detection value of the kth smoke parameter detected by the second gas detection device corresponding to the i-th spraying area within the first time period, is the maximum detection value of the kth smoke parameter detected by the second gas detection device corresponding to the i-th spraying area within the first time period; is the kth flue gas parameter in the spraying area corresponding to the current slurry concentration in the second pipe (7) and the rated slurry flow rate; is the cumulative multiplication symbol; M is the total number of smoke parameters detected by the second gas detection device; （2）； is the target flue gas flow rate, ln is the natural logarithm, e is the natural constant, is the first adjustment coefficient, is a second adjustment coefficient; the second nozzle (410) and the third nozzle (48) are N pairs of nozzle groups facing each other vertically; The sth flue gas parameter obtained by the third gas detection device corresponding to the third nozzle (48) in the jth pair of nozzles; an sth flue gas parameter obtained by a third gas detection device corresponding to the second nozzle (410) in the jth pair of nozzles; is the flue gas flow adjustment weight corresponding to the sth flue gas parameter; is the rated flue gas flow rate; （3）； is the target slurry flow rate of the nozzle corresponding to the dth area to be adjusted, The sth flue gas parameter obtained by the third gas detection device corresponding to the third nozzle (448) in the nozzle group corresponding to the dth area to be adjusted; The sth smoke parameter obtained by the third gas detection device corresponding to the second nozzle (410) in the nozzle group corresponding to the dth area to be adjusted; is the slurry flow adjustment weight corresponding to the sth flue gas parameter; is the rated slurry flow rate; is the preset gas state coefficient threshold; , are the third adjustment coefficient and the fourth adjustment coefficient respectively; is the gas state coefficient of the dth area to be adjusted.

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